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authorFaisal Latif <flatif@neteffect.com>2008-02-21 08:31:22 -0600
committerRoland Dreier <rolandd@cisco.com>2008-02-26 16:24:29 -0800
commit30da7cff87f0ffa169fe07b766c3d6a5f6d1f6ab (patch)
treee68206af4e17a9542b978ca97aaca1a373ba8349 /drivers/infiniband
parenta2e9c384ce76993cd68d6de57eaa81985b4618e3 (diff)
RDMA/nes: Fix CRC endianness for RDMA connection establishment on big-endian
With commit ef19454b ("[LIB] crc32c: Keep intermediate crc state in cpu order"), the behavior of crc32c changes on big-endian platforms. Our algorithm expects the previous behavior; otherwise we have RDMA connection establishment failure on big-endian platforms like powerpc. Apply cpu_to_le32() to value returned by crc32c() to get the previous behavior. Signed-off-by: Faisal Latif <flatif@neteffect.com> Signed-off-by: Glenn Streiff <gstreiff@neteffect.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/nes/nes.h15
-rw-r--r--drivers/infiniband/hw/nes/nes_cm.c10
2 files changed, 21 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/nes/nes.h b/drivers/infiniband/hw/nes/nes.h
index fd57e8a1582..a48b288618e 100644
--- a/drivers/infiniband/hw/nes/nes.h
+++ b/drivers/infiniband/hw/nes/nes.h
@@ -285,6 +285,21 @@ struct nes_device {
};
+static inline __le32 get_crc_value(struct nes_v4_quad *nes_quad)
+{
+ u32 crc_value;
+ crc_value = crc32c(~0, (void *)nes_quad, sizeof (struct nes_v4_quad));
+
+ /*
+ * With commit ef19454b ("[LIB] crc32c: Keep intermediate crc
+ * state in cpu order"), behavior of crc32c changes on
+ * big-endian platforms. Our algorithm expects the previous
+ * behavior; otherwise we have RDMA connection establishment
+ * issue on big-endian.
+ */
+ return cpu_to_le32(crc_value);
+}
+
static inline void
set_wqe_64bit_value(__le32 *wqe_words, u32 index, u64 value)
{
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 6c298aa9ab0..39adb267fb1 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -2320,6 +2320,7 @@ int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
struct iw_cm_event cm_event;
struct nes_hw_qp_wqe *wqe;
struct nes_v4_quad nes_quad;
+ u32 crc_value;
int ret;
ibqp = nes_get_qp(cm_id->device, conn_param->qpn);
@@ -2436,8 +2437,8 @@ int nes_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *conn_param)
nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
/* Produce hash key */
- nesqp->hte_index = cpu_to_be32(
- crc32c(~0, (void *)&nes_quad, sizeof(nes_quad)) ^ 0xffffffff);
+ crc_value = get_crc_value(&nes_quad);
+ nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, CRC = 0x%08X\n",
nesqp->hte_index, nesqp->hte_index & adapter->hte_index_mask);
@@ -2751,6 +2752,7 @@ void cm_event_connected(struct nes_cm_event *event)
struct iw_cm_event cm_event;
struct nes_hw_qp_wqe *wqe;
struct nes_v4_quad nes_quad;
+ u32 crc_value;
int ret;
/* get all our handles */
@@ -2828,8 +2830,8 @@ void cm_event_connected(struct nes_cm_event *event)
nes_quad.TcpPorts[1] = cm_id->local_addr.sin_port;
/* Produce hash key */
- nesqp->hte_index = cpu_to_be32(
- crc32c(~0, (void *)&nes_quad, sizeof(nes_quad)) ^ 0xffffffff);
+ crc_value = get_crc_value(&nes_quad);
+ nesqp->hte_index = cpu_to_be32(crc_value ^ 0xffffffff);
nes_debug(NES_DBG_CM, "HTE Index = 0x%08X, After CRC = 0x%08X\n",
nesqp->hte_index, nesqp->hte_index & nesadapter->hte_index_mask);